Monument



(No Model.)

A. MQKELLAR.

MONUMENT.

Patented June 23, 1886.

IIIIIIIIIIIITTEIWI 1 WM i m") y lmllullh PETERS mm'mlwgn hen Walhinglm D. C.

the completed part.

UNITED STATES PATENT OFFICE.

ABCHIBALD MGKELLAB, OF BRIDGEPORT, CONNECTICUT.

MONUMENT.

SPECIFICATION forming part of Letters Patent No. 320,488, dated June 23, 1885.

Application filed August 10, 1883.

T0 at whom it may concern.-

Be it known that I, ARCHIBATJ) McKEL- LAR, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Monuments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to metallic monuments, and has for its object to produce, in monuments made of material known as white bronze, the appearance and effect of IOUglIlIGWH or quarry-faced granite or marble.

Vith this end in view, my invention con sists in monuments made as hereinafter fully described, and then specified in the claim.

In the accompanying drawing of a monument, forming part of this specification, A is the base, made in accordance with my invention, of the said material,'and having its surface configured in imitation of rough hewn stone.

In order to produce the desired appearance, a convenient method will now be described, though I do not claim such method in this application. I first makea form in plaster having substantially the outline of I then with a chisel chip off fragments from the face of the form, in order to imitate as closely as possible the broken appearance of rough'hewn granite. The next step is to make a matrix in plaster, using the form as a mold. hen the matrix has become set or hardened, I spread a layer of plastic clay over its inner surface. This layer of clay is applied evenly, and is made just the thickness that it is desired to have the metal of the completed casting. hen the layer of clay is completed,the interior of the matrixis filled in with plaster to form a backing. \Vhen the plaster in the backing has become set it is lifted out and the layer of clay removed. The backing is then replaced and the space between the backing and the matrix is poured full of melted wax. The wax adapts itself perfectly to the'minutest lines of the matrix, and coolswithoutshrinking.- As soon (No modeLll as it becomes cooled it is ready for use as the pattern for the regular casting in the sand. I thus secure in white bronze a perfect imitation of rough-hewn granite, and, moreover, add greatly to the strength of the completed monument.

It is of course well understood that all monu ments of this class are cast in sections or plates,which are secured together so that the joints become as solid as the plates themselves.

After the joints are finished the whole structure is exposed to a sand-blast, which gives the final finish to the monument.

My invention, which I term rough-ashler finish, is not necessarily restricted to the base, as the shaft itself or any portion thereof, or any of the sections in the structure, may be given the rough-ashler finish.

I am well aware that itis not new to make monuments in parts or sections, and make no claim thereto. I am also aware that various designs forornamentation have been cast upon the sections, and that monuments have been enameled in imitation of slate, granite, &c., which has nothing to do with my present style of monument.

I am aware that monuments have been cast in sections, with beads, panels, steps, &c., in their exterior outlines-as shown, forinstance, in patent to M. A.Richardson,January 19,1875. I am also aware that an irregular surface in an ornamental design is not broadly new, such being shown in patent to J. Hewitson, February 24, 1880. This, however, I do not claim; but,

Having thus described 1nyinvention,what I In testimony whereof I alfix my signature in presence of two witnesses.

ARCHIBALD MOKELLAR.

WVitnesses:

A. M. WoosTER, S. S. WILLTAMsON. 

